Automatic orthographic projection device

ABSTRACT

My orthographic projection device for projecting a third compound view of an object includes a follower means to follow the lines of an object in one view, a second follower means to follow the lines of the object in the second view, and a third view follower means operable to automatically develope a compound third view of the object from the combined movement of said first and second follower means.

United States Patent [1917 Manning [451 Apr. 22, 1975 1 1 AUTOMATIC ORTI-IOGRAPI'IIC PROJECTION DEVICE [76} lnventor: Wilbur Manning, 615 Willard,

Rochester, Mich. 48063 [22] Filed: Sept. 20, 1971 [21] Appl. No.: 181,974

[52] US. Cl 33/18 C [51] Int. Cl B431 13/00 [58] Field of Search 33/18 C, 77

{56] References Cited UNITED STATES PATENTS 1,826,338 10/1931 Ackerberg 33/77 2,171,587 9/1939 McGrcgor..... 33/18 C 2,714,253 8/1955 Stone 33/18 C 3,295,210 1/1967 Kelsey 33/18 C FOREIGN PATENTS OR APPLICATIONS 17.455 1890 United Kingdom 33/18 C Primary E.\-aminerHarry N. Haroian Attorney, Agent, or Firm-Gerald R. Hershberger [57] ABSTRACT My orthographic projection device for projecting a third compound view of an object includes a follower means to follow the lines of an object in one view, a second follower means to follow the lines of the object in the second view, and a third view follower means operable to automatically develope a compound third view of the object from the combined movement of said first and second follower means.

1 Claim, 8 Drawing Figures PATENTEU 2 3.878613 INVENTOR PV/ZBVA M MA/V/V/A/G A TTO/P/VEV AUTOMATIC ORTHOGRAPHIC PROJECTION DEVICE BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to devices for projecting points or lines formed from a succession of points and more particularly to a line projection device which can be used as an everyday work tool in the drafting room where it is necessary to obtain a tipped" or compound angle views of an object from the usual engineering view such as in tipping panels preparatory to designing dies for their manufacture.

2. Description of the Prior Art In the prior art, in the drafting room, the usual practical customary way oftipping a panel or other object, to obtain an auxilliary view is to use dividers or compasses, and the draftsman or designer laboriously transfers points from two predetermined views orthographically to third view which is required for some reason, such as a balance line or tipped line for a draw die. Although in engineering of a product, such as a motor vehicle body, it is part of regular practice to project auxilliary or or compound views of an object in designing same, the process of projecting the third, or compound view or resultant line is being done laboriously by engineering draftsmen projecting the third view point from the two predetermined views substantially in the same manner as mentioned for die designers.

SUMMARY OF THE INVENTION My invention overcomes the above mentioned problems and deficiences of the prior art, and in so doing has provided for the draftsman or designer, a practicable efficient, fast and economic means of developing or projecting a third view at the drafting board by automatically projecting the third view of an object, thereby saving the time and the energy and nerves of the draftsman.

BRIEF DESCRIPTION OF THE DRAWING FIG. I is a plan view of my projecting device as placed on a drafting board in connection with a drawing in which it is desired to project an auxilliary or third compound view from two predetermined views.

FIG. 2 is an elevational view of my invention taken along lines 2--2 of FIG. 1.

FIG. 3 is an elevational view taken along lines 33 of FIG. 1.

FIG. 4 is an elevational view of my invention taken along line 44 of FIG. 1.

FIG. 5 is an elevational view taken along line 55 of FIG. 1.

FIG. 6 is an elevational view taken along line 66 of FIG. 1.

FIG. 7 is an end view of FIG. 3, taken along line 7-7 of FIG. 3.

FIG. 8 is a sectional view taken along line 8-8 of FIG. 2.

DETAILED DESCRIPTION OF THE INVENTION Referring now in detail to the drawing and in particular to FIG. 1, the numeral 10 denotes an orthographic projection device constructed in accordance with my invention, and including a base denoted generally by the numeral 11, a first follower means 12 is mounted on said base and constructed and operable to pick up points" or follow a line shown in view 13 of at least two related predetermined views ofa point 14 or object line 15 defined by a series of points 15A arranged in orthographically projected relationship to each other.

A second follower means 16 is mounted on said first follower means 12 and is operable to pick up said point 14 or follow said line 15 in the second view 16a of said predetermined two views in relation to a No. 1 work line 18 through said point 14 in both said predetermined views at the same time said first follower means is picking up said point in said first view and said second follower means is operable in combination with a third view follower chuck 64, to automatically project a third view of said point 14 or object line 15, in response to coordinated operation of said first follower means, in a third plane or view 19 with respect in relation to a No. 2 work line 20 located in said second of said predetermined views and in said third view 19, as will more fully appear from the following detailed description of the construction and operation of the de- VICe.

The construction and operation of the first follower means is further described in FIGS. 2, 3, and 7, as including a generally horizontal rail or track portion 21, having a generally T-shaped rail base element 22, fixedly mounted on said mounting base 11, a generally flat platform element 23 mounted on said T-shaped rail base element 22, two parallel lower elongated bearing support rails 24 fixedly mounted on said platform element, two similarly elongated rod-like bearing members 25 fixedly mounted on said bearing rails 24, a pair of similar upper rod bearing tracking members 26 each mounted on a corresponding rod-like bearing member 25 for transverse movement thereon, a first follower mounting plate 25a fixedly fastened to said upper tracking members, a cantilevered arm member 27 is fixedly mounted on said first follower mounting plate in perpendicular relationship to said rod-like bearing member 25, the free end 26 thereof extending in selfsupporting manner a substantial distance from said bearing member 25 to enable points or lines to be picked up at a substantial distance from said bearing member 25. An intermediate elongated support arm member 28 is slidably mounted lengthwise in a centrally located elongated first cavity 27A on said cantilevered arm 27, and a lateral arm member 29 is pivotably mounted on the under face 30 of said first intermediate arm member by a pivot bolt 31 and nut 32. A first follower chuck member 33 is mounted fixedly against the under surface 34 of said lateral arm member 29 and securely holds the point 37 of elongated follower rod 36 in position on point 14 in the first view thereof. Said first intermediate arm member 28 further includes a generally elongated smaller second cavity 28a below said first cavity and central therewith, and a second view follower arm 37a is mounted in said second cavity and is movable lengthwise freely centrally within said intermediate arm along said No. II workline. A second follower chuck member 38 is mounted centrally on said arm adjacent its outward free end 38A for picking up said point in said second predetermined view. Said chuck further includes a spring mounted point member 39 having an internal compression spring 39A, vertically adjustable to automatically compensate for differences in height between said first point pickup point-37 and the generally flat work surface 40.

The outward portion 41 of said cantilevered arm member 27 is slotted centrally and longitudinally to permit entry therethrough of force engaging boss 42 which is fixedly mounted on said second view follower arm 37 intermediate the outer free end 38a and the inside extremity 43 thereof. One free bent end 44 of the wire member 45a of a motion transmitting means or bowden wire assembly 45 is fixedly fastened to said boss in bore 46 thereof. The tubular non-compressible casing 47 of said wire assembly 45 is fixedly secured by clamps 48 to said cantilevered follower arm member 27. The bowden wire assembly 45 is then arcuately bent to where the opposite end 49 of said casing 47 is fixedly mounted by clamps 50 to a third view intermediate slide arm member 51, said arm member 51 being slidably mounted and secured in larger cavity 52 longitudinally by means of guide plates 53 mounted on said lateral arm member 29. Said arm member 51 is positioned and selectively movable in the general location of said third view 19. A third view follower arm 54 is slidably mounted centrally in a smaller cavity 55 having a linear path wall 54a below said lateral arm member, said lateral arm member having an elongated slot 56 through which extends a third view follower boss 57, said boss being fixedly mounted to said third follower arm 54 generally intermediately the ends 58 thereof. The remaining free end 59 of said bowden wire being fixedly mounted in bore 60 in the upper surface 61 of said third view boss 57. The lower surface 61 of said third view intermediate lateral slide arm has a slotted passage 62 extending longitudinally and centrally from said lower smaller guide cavity through said lower surface 61. A third view point follower chuck 64 is mounted on said third view follower arm 54 on lower surface 61 centrally and generally between said ends 58. Said chuck 64 extends through slotted passage 62 downwardly and carries a spring mounted point follower 65 having a point 66. The floating characteristic provided by spring 67 permits the point 66 to adjust to variations in height, which height is initially determined by vertical location of point 37.

A generally T-shaped rail-like slide 68 is fixedly mounted to said third view intermediate guide arm on the said lower undersurface 61 thereof, at right angles to said lateral slide arm 51. A third view cylindrical rod-like guide member 63 is mounted on a generally L-shaped elongated mounting rail 70 having an arcuate surface or lateral path wall 71 for centrally locating said guide member 63. The lower arcuate recess 72 of said T-shaped slide member 68 mates with the curvature of said cylindrical guide member 63 and is movable slidably thereon. Slide locking plates 73 secure said third view intermediate arm to said cylindrical guide member 63. Said cylindrical guide member extends from the free end 74 to a restrained or pivoted end 75. The pivoted end 75 is pivotably mounted to base 11 by a clamping means or bolt and 76 and nut 77 at the upper right corner 78 of said base adjacent the right end 79 of said track portion 21.

Said cylindrical radial guide member 63 is pivotable to permit said third view to be projected at any desired angle with respect to said No. 1 work line.

The guide member 63 is held stationary when projecting a third view, the only time said member is moved is when it is desired to project a third or compound view at a different angle to the first view.

It is now apparent that in operation, the point 37 of first follower chuck member is placed in position on descriptive point 14, and the second follower chuck member 38 is moved by the operator to locate or pick up said point 14 in said second predetermined view, and as said second follower chuck member is moved to pick up said point, the bowden wire moves with it and simultaneously moves said third view follower chuck 64 the same distance said second follower chuck is moved, fixing the location of point 14 in said third or developed view. The third view guide member or radial arm 63 is fixed in location and maintains the relative distance between views, and the first chuck being axially and and centrally aligned vertically with pivot bolt 31, and axially aligned longitudinally with respect to said second chuck assures that the same point is always being projected from the two predetermined views to said third view.

It is understood that although a bowden wire means is disclosed as a motion transmitting means to transfer said point 14 to said third or auxiliary view, that other means such as hydraulic means or electrical force means can be employed for this purpose.

While there is here shown and described specific embodiments of this invention, the latter is not limited to the exact details of construction set forth, and the invention embraces such changes, modifications and equivalents of the parts and their formation and arrangement as come within the purviews of the appended claims.

What is claimed is:

1. In an orthographic projection device for determining a third resultant orthographic projected view of an object from two related predetermined orthographically projected views of the object, the combination of,

first predetermined view follower means including a first view line follower element selectively movable at will along the line of the object in one of said predetermined views, I

second predetermined view follower means includin a second predetermined view line follower element selectively movable along the same line of the object in the other of said predetermined views, said second follower element being connected in orthographic projection relationship with said first follower means, third view indicating means including a line tracer member, a third view lateral path wall and a third view linear path wall connected from said first follower element in perpendicular relationship to said lateral path wall so that said tracer member is operable to move an equal distance laterally with said first follower element along said lateral path wall in line tracing relationship with said first follower element when said first follower element is moved, and a force transmitting member connected to said second follower element and said line tracer member so that said tracer member is moved simultaneously along said third view linear path wall a distance equal to the travel of said second follower element in in said second view when said second follower element is moved to automatically produce a third orthographic view of said line compounded from said predetermined orthographic views of saidline. 

